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<span id="Old_002dstyle-variable-initialization-1"></span><h4 class="subsection">5.1.2 Old-style variable initialization</h4>

<p>GNU Fortran allows old-style initialization of variables of the
form:
</p><div class="example">
<pre class="example">      INTEGER i/1/,j/2/
      REAL x(2,2) /3*0.,1./
</pre></div>
<p>The syntax for the initializers is as for the <code>DATA</code> statement, but
unlike in a <code>DATA</code> statement, an initializer only applies to the
variable immediately preceding the initialization.  In other words,
something like <code>INTEGER I,J/2,3/</code> is not valid.  This style of
initialization is only allowed in declarations without double colons
(<code>::</code>); the double colons were introduced in Fortran 90, which also
introduced a standard syntax for initializing variables in type
declarations.
</p>
<p>Examples of standard-conforming code equivalent to the above example
are:
</p><div class="example">
<pre class="example">! Fortran 90
      INTEGER :: i = 1, j = 2
      REAL :: x(2,2) = RESHAPE((/0.,0.,0.,1./),SHAPE(x))
! Fortran 77
      INTEGER i, j
      REAL x(2,2)
      DATA i/1/, j/2/, x/3*0.,1./
</pre></div>

<p>Note that variables which are explicitly initialized in declarations
or in <code>DATA</code> statements automatically acquire the <code>SAVE</code>
attribute.
</p>



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